Three single-phase transformers are used to form a three-phase transformer bank rated 18 MVA, 13.8Δ-120Y kV. One side of the transformer bank is connected to a 120-kV transmission line, and the other side is connected to a three-phase load of 10 MVA at 13.2kV and 0.8 lagging power factor.
Using the base in the tranmission line of 120-kV and 20 MVA, find the load impedance in per unit to be used in the line-to-neutral impedance diagram.